Arc-lamp.



W. L. PATTERSON.

ARC LAMP. APPLICATION FILED JUNE 8,1912.

2 SHEETS-SHEET 1.

E] n 0214 601, VVi'ZZz'a m L Patters 02 1,

Patented Feb. 23, 1915.

L. PATTERSON.

ARC LAMP.

APPLICATION FILED JUNE 8, 1912.

2 SHEETSSHEET 2.

@nvewioz VVi'ZZZZEIH/L Pa fiferson Patented Feb. 28, 1915.

UNITED STATES PATENT OFFICE.

WILLIAM L. PATTERSON, OF ROCHESTER. NEW YORK, ASSIGNOB TO BAUSCH & LOMB OPTICAL COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.

ARC-LAMP.

Application filed Zl'une 8, 1912.

To all whom it may concern Be it known that I, WILLIAM -L. PATTER- SON, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Arc Lamps; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the ac-.

parts which enables the electrodes to be Still another object of my improvement consists in providing means for feeding the electrodes in directions at angles to each other, they being held yieldably in engagement with the feeding devices, so that thev may be moved independently, when desired.

To these and other ends the invention con sists in certain, improvements and combinations of parts all aswill be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

in the drawings: Figure 1 is a side elevation of a lamp constructed in accordance with one embodiment of the invention; Fig. 2 is a front view of the same; Fig; 3 is a vertical sectional view on the line 3* 3 of Fig. 2; a: is a transverse sectional view on the line Q F of Fig. 1; Fig. 5 is a detail view in elevation showing one of the electrode holders, and Fig. 6 is a detail sectional view through one of the electrode actuating members, and its support.

Similar reference numerals throughout the several figures indicate the same parts.

In the present embodiment of the invention, A designates a lamp body, such as used for lanterns in projecting apparatus and similar machines, and B are the carbon elem trodes, preferably disposed at right angles to each other, as shown. electrodes are arranged to be moved by suitable actuating Specification of Letters Patent.

Patented Feb. 23, 1915.

Serial No. 702,436.

members, which preferably comprise the rolls '1. Said rolls have annular grooves 2 formed thereon to engage the electrodes, the grooves being transversely corrugated at 3 so as to grip the electrodes with sufficient force to effect movement thereof. The rolls 1 are constructed of porcelain or other suitable insulating material, and are suitably mounted on arbors 4, preferably by means of pins 5 extending through the arbors and arranged in cooperating recesses in the rolls. Also mounted on the arbors 4 are the pinions 6 arranged to mesh with each other, as shown in Fig. 2. The arbors are mounted in suitable bearings 7 formed in the lamp body A, and may be rotated in any suitable manner as by means of a hand piece 8 secured to the end of one of the arbors, which is extended through the lamp body for this purpose as shown.

The electrodes are mounted in holders 9 which are pivotally mounted at 10 on the supports 11, the latter being suitably attached to the lamp body and insulated therefrom. The supports 11 are provided with recesses in which are mounted the springs 12, arranged to engage the holders 9 so as to move the latter on the pivots 10. away from the lamp body, and thus normally effecting engagement between the electrodes and the rolls 1. Connections are made with the holders 9 by means of the openings 13 and set screws it. By this construction, itwill be seen that either electrode may be moved independently of the other by forcing it slightly away from its actuating member, against the tendency of the spring 12, and sliding it in its holder. When in their normal positions, as shown in Fig.- 4, simultaneous movement of the electrodes is effected by turning the hand piece 8, which moves a pair of electrodes, of rolls in engagement with the electrodes and connected together for simultaneous movement, holders for supporting the electrodes against said rolls, the holders being pivotally mounted to swing in the plane of the rolls, and springs in engagement with the free portions of the holders whereby to force the lat ter normally in a direction so as to effect contact between the electrodes and therolls.

2. In an arc lamp, the combination with a pair of electrodes, of rolls in engagement with the electrodes and connected together for simultaneous movement, holders for supporting the electrodes against said rolls, the holders being pivotally mounted to swing in the plane of the rolls, and means cooperating with the holders and actuating them so as to efiect contact between the electrodes 

